Method of taking up the play of spikes



Dec.4 9, 1941. A. P. sTREVr `METHOD OF TAKING UPl THE PLAY SPIKES lOriginal Filed Nov. 50, 1937 Patented Dec. 9, 1941 tUNH3-"m5SW1*'ES PATENT OFFICE y L .Albert..Patilk Streit, achan,France Original applicationNovemb'er 30', 1937, Serial No. 177,364. Y Divided and this application June 3, 1940, Serial N0. 338,605

a claims. (o1. zas-373) Thel present application is a division of my co-pending application Ser. -No. 177,364, led Nov. 30, 1937, and issued as Patent No. 2,222,546, Nov. 19, 1940.

This application relates tothe `fixatiox'i of noncircular spikes in holes of Ycorrespond-ing shape provided in wooden railway sleepers'.

The chief object of the present invention is to provide a method of treating railway sleepers so as to perm-it of replacing a Yprisma-tic;and in particular,square-shaped, spike having a worn out hole by another spikeof corresponding shape.

Other-'objectsy of the present invention will result from the following detailed description of some specific embodiments thereof.

- A preferred embodiment of the present invene tion will be hereinafter described, with reference to the accompanying drawing, given merely-by Way of example, and in which: f l Fig. -1 is a lvertic'alsection of a 'railway track showing the Vwooden sleeper, the frail, .and the spike, in position; f 1 2 is a horizontal sectional view on the'line II-II'of Fig. 1; y

Fig. 3 is a perspective view of the spikevshown by Figs. 1 and 2; v f Y Fig. 4 is a perspective -view of a mandrel provided with a lining, for use according to the invention;

Fig. 5 is a View on an enlarged scale showing the section of the lining;

Fig. 6 is a cross section of the hole formed in the sleeper, after the lining has been placed therein;

Fig. 7 is a similar cross section showing the deforming of the hole;

Fig. 8 is a similar cross section illustrating the driving of the spike into the hole after the lining thereof has been deformed;

Fig. 9 is a vertical sectional view showing they,

spike in position;

Fig. 10 is a partial view on an enlarged scale corresponding to Fig. 9;

Fig. 11 is a sectional View on the vline XI-XI of Fig. 10;

Fig. 12 is a sectional view,analogous to Fig. 8, corresponding to the/,case of a spike having a square-shaped endinstead of a bevelled end.

As shown byfFig. 1, in a railway track, each rail l is kept in position on a sleeper 2 by means of spikesv such as 3. Each of said spikes, of square section for instance, is driven into a hole nll of circular section, made in advance in sleeper 2, so that the nose 5 of the -spike is applied against the liange 6 of rail l.

hole thus lined, so as to obtain When the spike has worked loose lin its" hole, it becomes necessary to replace it.

For this purpose, according tothe invention, I make use of alining 1, helical'ly `wound in' the holel and of lV-shapedsection, with the apex of the V on the outside so las to cut into the wall of the hole, said lining being madel of a malleable metalor alloy, rust-proof and having a high coefcient of elongation, for instance of annealed brass.

As shown by Fig. 5, the thickness of the branches of the V decreases fromthe apex toward the edges lb.

In order toV place the lining in' position inside the hole, said'lining is helical-ly wound around -a threaded mandrel 9y of circular section, the diam-eter andsize of the threads of said mandrel being such that when the lining is coiled thereon, as shown by Fig. 4, the outer diameter of the coil is larger than the length of the side of the square hole butsmaller' than the diagonal-thereof.

Asshown by Fig. 4, the driving endV of the mandrel is provided with an eye in which the end of the coil can be Aengaged so as' tofix it to the mandrel during the screwing thereof'.-

When the lining has thus been fitted on man--A drel 9 as shown by Fig. 4, the whole is screwed into the hole existing in the sleeper.

The mandrel is then removed byfunscrewing, which immediately breaks the `end of the lining engaged in the hole of the mandrel. Therefore, during this unscrewingfoperation, lining 1 remains in the hole, .finto the walls of which it has cut during thesCrewing operation, owing to its V shape. K

Aftenremoval of the nrndrel, lining 1 remains in position in hole 4, as sheath by Fig. 6.kr

The new spike 3 is then hammered into the rfixation as shown by Fig. 9, Fig'. l0 and Fig. 1'

This driving ofthe square-shaped s` ylireninto the lined hole produces a further penetration of the lining into the wood of the sleeper. y'

lining is wedged between the wall ofthe sleeper andl the walls of the spike, and especially the edges thereof, thus tightly holding said spike in position lin said hole.

Advantageously, according to the invention, in order to prevent the threads of the lining coil fromy being ,battered down by the opposed edges 3b (Fig. 3) of the spike when the latter is being driven into the sleeper hole, saidhole, after it has been fitted with its coiled lining, is given an Fung.. thermore, the coiled band which constitutes the oval section by previously driving therein a tool of suitable section, diagrammatically illustrated at I (Fig. 7). As a consequence of the driving ofgsaid tool l0, the ridges'la of the lining coil l penetrate more deeply into `the wood of sleeper v2 gwhile'edges' 'lbr are slightly movedaway fromV sai'dv/ood wall.

lifterl removal V*of 'tool lo; the spike 'can be driven Ainto-"the, 'sleeperfhole Fig. 8 showsv that :thewbevelled end3a rof Ythe spike can vfreely en- Vgage'into the sleeper hole, owing to the oval. shapek given thereto, withoutgtouching theffirst.

threads of coiled lining 1. Instead of having a bevelled end as shownby Fig. 3, the spike may-have a pointed end,that

is to say have its four facesainclinedwIn this t case, it is advantageous tofdeformfthe sleeper hole in two directions atri'ght'anglesfto' each 1 if other, as shown at Fi and F2 inFig. 12,v This deformation is obtained by means of a tool of tapered shape having four ridges at l0ftoone :'lother n l1 l .V Ina general'manner, while Ihave, in the .above "descripti'on, disclosed what lfdeem to4 be practical rand efficient embodiments t rof the present Vinvention, it should be'wellfurderstood that I do not wish to be limited theretoV as there might be changes" 'madeA4 in the arrangement, disposition and formv of the parts without departing from uthe principle 'of thel presentinvention as compre- A,hended withinthe scope of the appended claims. f` AWhatcla'ini is: e v Y 'l'A methodof securing a spike of square sectionrinto a Wooden railway sleeper having a spike hole of correspondingl section formed therein, by

means of fa -rod' of malleable metal, and of f -`\"/shaped channelA cross section and a vscrewthr'eade'd mandrel, which comprises winding 'said rnd onte said mandrel into a coil`with the groove of the VY engaging the thread of the mandrel, the outer diameter of the coil beingsmaller than the diagonal of the sleeper hole square section but larger than the-side o f said sqiiarefsection, securing the drivingvend of the coil to the Vend. of thermendrel, Serewinethe wilson. thefmandrel into a portion of the walls of said hole, unscrewing the mandrellfrom the coil thereby detaching the mandrel therefrom, enlarging the hole thus lined along at least one diameter thereof, and driving into the hole thus treated a spike of square section and straight edges having its end flattened in the direction of said diameter.

2. A method of securing a spike of square section into a wooden railway sleeper having a spike hole of, square section formed therein, by 'means =of al rod of"malleable-metal and of @Vv-shaped channel cross-section and of a screwthreaded mandre1,which comprises winding said rod on said mandrel into a coil with the groove of 'the' V engaging the thread of the mandrel, the outer diameter of A thecoilbeing smaller than the Vdiagonal of the sleeper hole square section, Vsecu'ringethex driving end ofthe coil to the end r ffifngthey;mandrel',l screwing thevcoil on the mandrel into aportion of thewalls of saidhole, unscrew- Y ingthe mandrel from theY coil thereby detachingtheV mandreltherefrom, enlarging the hole thus linedl alongyone diametervthereof, and forcing a square spike-Y having .afilat tapered end into the sleeper. holelined withfsaid coil, with the flat end of said spike in the plane ofsaid diameter of thehole. K e e Y 3. A method.` nof vsecuring lagspike of square section in ar wooden railway sleeper having a spike hole of corresponding section formed therein, bymeans of arodof` vmalleable metal and 0 of jV-shaped channel-,cross section and of `va screw-threaded mandrel,l which comprises winding said rod-on saidxmandrel into a coil, with the groove of the V engaging thethread of Ythe mandrel, the outer;y diameter ofv the coil lbeing smaller than, the diagonal-0th, the-,sleeper -hole square section, securing the driving end of `the coil to Vthe end of the mandrel, screwing the coilon the mandrel into a portion of the walls v of said hole, unscrewing thelmandrel froml the 4Q coil thereby detaching theg'rmandrel therefrom, enlarging the .hole thus lined.V along tWoQper-Z pendicular diameters thereof,l and v,forcingMa.. squarejspike having a `square tapered; end into the sleeper hole lined with said c oil,j withthe l5 diagonal planes 'of the; spikeA said diametral planes of said hole.

Y ,ALBERT PULSTREQ Y 

